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Abstract
The thermal comfort of a riverside residential settlement differs from a non-riverside residential one, which might be caused by a microclimatic difference. Inducing wind from a river to cross the whole riverside residential settlement could improve the outdoor thermal comfort significantly. Such knowledge triggers a study of utilizing river wind to enhance thermal comfort to a riverside residential settlement in southern China. The study explores various possible layouts of a riverside residential settlement using Computational Fluid Dynamic (CFD) simulations. The thermal comfort index OUT_SET* (the Standard Effective Temperature) that combines effects of air temperature, radiation, wind velocity, and the water evaporation, has been used to evaluate thermal comfort of various riverside residential settlements due to different design layouts. The result showed that the loose enclosed layout is the best one for the thermal comfort whereas the back and front aligned determinant layout is the worst. In order to apply the results into a real world, a case study has been made to the Shenzhen Nan Hua Cun. The thermal environment of this Chinese southern riverside residential settlement has been researched. According to thermal problems revealed by CFD simulation, an optimization design layout was proposed by applying the study results. Eventually, the thermal comfort between the current situation and the optimization design has been compared.
Highlights
“Heat Islands” have serious influence on urban thermal environment
Studies have been made on design alternatives to improve thermal environments in outdoor spaces [21,22,23,24], less work has focused on exploring design layouts of riverside residential settlements due to waterbody influences
The calculated average Outdoor Standard Effective Temperature (OUT_SET) along with the air temperature (AT), relative humidity (RH), and wind velocity (WV) of each design models are shown in the Table 2
Summary
“Heat Islands” have serious influence on urban thermal environment. This fact is being increasingly recognised when doing a design [1]. Martínez-Arroyo and Jáuregui observed that, in addition to benefit thermal comfort, a water body could increase conversions between oxygen and carbon dioxide and decrease carbon dioxide levels [9] These studies showed that water bodies, especially large ones, could enhance the surrounding environments. The purpose of this study is to explore design approaches in utilizing the river benefit to reduce heat effects and improve outdoor thermal comfort to a riverside residential settlement in the Chinese subtropical area. Using Computational Fluid Dynamic (CFD) simulations, various design layouts of riverside residential settlements are compared and the optimization ones are gained Their effectiveness in achieving thermal comfort are tested. A case study in Shenzhen Nan Hua Residential Settlement was made by applying the study results
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